Library / Midstream and Downstream Petroleum Operations Regulations 2025
Midstream and Downstream Petroleum Operations Regulations 2025

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37.—(1) The primary measurement method for determining the quantities
of petroleum liquids or natural gas or its derivatives shall be by dynamic
measurement method.
(2)  Notwithstanding subregulation (1) of this regulation, where dynamic
measurement method is not applicable, static measurement method shall apply
subject to conditions prescribed by the Authority.
38.—(1)  A metering system for measuring petroleum liquids or natural
gas or its derivatives shall not be designed without the approval of the Authority.
(2)  A meter bank shall be designed to N+1 philosophy and make provisions
for the proving system.
(3)  An application for approval under subregulation (1) of this regulation
shall be accompanied with —
(a)  the type of meter selected and selection criteria;
(b)  design philosophy;
(c)  fluid properties;
(d)  type of proving method;
(e)  location; and
(f )  project cost estimate.
(4)  The design and location of a metering system shall be easily accessible
for condition monitoring, maintenance, replacement, recertification and repair
works.
39.—(1)   A licensee or permit holder shall not procure, fabricate, assemble,
integrate, ship, install, modify or commission a measurement system, sampling
system, proving system or flow computer without conducting appropriate tests,
calibration, inspection and verification exercises.
(2)  The Authority shall witness the activities stated in subregulation (1) of
this regulation.
(3)  The result of a test in subregulation (1) of this regulation at a fabrication
shop or site, shall be validated to ensure the system meets the requirements
prescribed by the Authority.
(4) Measurement systems used for petroleum liquids or natural gas or its
derivatives shall not be approved for shipment into Nigeria, unless the following
minimum conditions are met —
(a)  meters are tested and calibrated;
(b)  critical equipment are inspected and tested;
(c)  sampling devices are tested and calibrated; and
(d)  proving systems are inspected, tested, and calibrated.
Measurement
methods
Metering
system
design
Testing,
calibration
and
inspection of
measurement
system